______ we are doing has never been done before.
| A．That | B．What |
| C．Which | D．Whether |
______ Beijing you see today is quite ______ different city from what it used to be.
| A．The; / | B．/; the | C．The; a | D．A; a |
_______ you call me to say you are not coming, I’ll see you at the theatre.
| A．Until | B．If | C．As | D．Unless |
Each of the students, working hard at his lessons,__________to go to key universities.
| A．hope | B．hopes | C．hoping | D．hoped |
---You just think of yourself! You kept us waiting for you for over two hours.
---I’m sorry that you _____________think so.
| A．would | B．should | C．could | D．might |
Let’s look up the word in the dictionary.Do you have one ____________?
| A．in hand | B．in need | C．at once | D．at your hands |